UPDATE: GM Holds 2012 Camaro ZL1 for Potential Quality Concern

A letter to Chevrolet dealers from General Motors has surfaced on enthusiast forums, including GM Inside News, saying that "all Camaro ZL1 models produced to date are currently being held by General Motors for a quality assessment." The letter was sent by Russell Clark, Director of Chevrolet Small Cars, Small Utilities and Performance Cars Marketing.

We called Chevrolet to inquire about the authenticity of the letters. Monte Doran confirmed the letters were sent to dealers and that "during a quality assessment [before the cars reach customers] they found a potential quality concern." He did not state what it was because GM is still investigating the issue.

According to the letters "the duration of the hold is undetermined, and may last a few more weeks." Dealers will be notified when the hold is lifted and shipments of the Camaro ZL1 models begin. Click here to read the complete transcript of the letter on GM Inside News.

UPDATE: According to GM Authority the quality control issue is standard procedure and that all production at the Oshawa Assembly plant has been shut down due to a scheduled week long closing. All vehicles at the plant are affected, not just Camaro ZL1 models. Another week-long shutdown is planned from March 26 to April 1. The shutdowns are needed to update the assembly line. This isn't the first shutdown to update the line - there was one a few weeks ago.